Force-feed lubricating apparatus



21 1927. June H. ALBERTINE FORCE FEED LUBRICATING APPARATUS Filed Jan. 9. 1926 www.

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Patented June 21, 192'7.

UNITED STATES 1,633,356 PATENT OFFICE.

ALBEBTIIE, l EMT BUTmFOBD, IEW um, SIGNOR '.l P. 303m m 60mm (ING. A OOBPORATIUI 0l' NIW YORK.

70m-FEED LUBIIBATIHG IFM ATD'S.

Implication Med huur! i. 188. lsrlnl lo. $0,188.

My present invention relates to apparatus of the above type, particularly designed for forcing grease into ubricutiiig ducts of bearinps, particulnrl on automobiles und specilis cn ly considere: it is designed for general mirage use, being equally well adapted for alge-quantity, low-pressure feed'as for the c of universal jiints, diierentiul gears,

etc., and for higher ut still moderate presio sure such as is required to force the grease through the vulve ducts or ni ples used on automobile bearing und for t instill higher pressures that may necessary where such vulves 0i' ducts ure stuck or clogged. It i will be evident, however, that the device und various features thereof muy be usef in many other relations where it is desired to have the reservoir feed of fluid against widely different resistunces, particularly where the' amount of resistance cannot be known until pressure is applied in an eliort to overcome it.

More specically considered, the invention includes a grease reservoir, means for epplying presiure to the entire body of grease to force it through a. lubricntin outlet passage und means whereby the e ective pressure in the passa is automatically multiplied when u resistance to be overcome exceeds u predetermined velue. Preferably, the primary pressure whereby my apparatus gives the above described direct initial elect und the above described eutomuticall multiplied elect, is compressed Ens, and or ordi- 36 nary pu oses the gas wi be air und the source o pressure an ordinary tire iilling apparatus such as is in common use in the gang- The above is also accom lished by rovid- 40 ing a reservoir, preferoby s cylin ci', in w ichebody'of renee is maintained between two pistone, a primary, double-beaded piston, the reniface of which is subected to the pneumatic rassure and the ront face of which app ies the pressure to the are. The secondary piston, enclosing the other and of the body of grease, is normellyheld in a predetermined potion by means of a. spring and in such position serves merel as u wall of the reservoir through wliic grease is forced throu h the outlet, by the pneumatic pressure o the prima piston. he outlet, however. comprises te escoping members, one of which Ais the fixed nozzle for application to the device to be lubricated,

and the other of which is carried by said secondary piston. So long as the resistance against which the grease is being forced, is lees the pressure of the spring holding the secondary piston in its normal 'position the ce oi'rs out thi-ou die piston head und libe carried thereby, into the iixed tube only under the r unre inch premura3 aiorded by the air behind the primary' piston, but when the resistance becomes sollic1 ent, the measure piles gr und the secondnry pieton is oiced rearwar ageinstitsspring telescoping into the lix nozzle tube an dilclig grease which necessarily flows bu a into the reservoir. This back-How of grease is prevented check valve which automatically closes, w erou n the entire pressure over the flut urea o the secondary piston is applied on the small cross section of grease in the telescoping members. Even in s. relatively small diameter gun, the aren ofthe secondary piston muy be, say, five square inches as against {tli square inch cross-section of the telescopic linder, which is now acting as the piston. Vn auch case, n

rassure of, sa 50 pounds per sguare inch rom a. tire in ating s stem applied behind the primary piston w' apply a ressure of, say, 250 pounds on the total ve uiire inch aree of the secondary piston, on this 260 pounds pressure applied on u ,Hlth square inch cross section gives 'im elective maximum pressureV of 2500 pounds to the square inch at the outlet of the grease gun.

Another feature o the invention is u very simple 'valve and `tiig r operating means located on the rear en of the grease gun, in convenient relation to the thumb of the user, this valve being easily operable either to apply or vent the pneumatic pressure behind the primer piston, and to thus variabl increuse or ecreuse effective pressures, rom zero or atmosphere up to the maximum pressure available from the source.

It is evident that the source may sup ly 100 a. much higher pneumatic preure than t at indicated above; also that the term pneumatic is intended to include pressure of gases other then .nir es, for instance, the high pressures available from containers forliqud 105 carbon dioxide; also that the lubricating material referred to asV Fresse may any lubricant, including re atively thin oils as well as the hardest or stickiest greases used for lubrication.

The above and other features of my ini'ention will be more evident from the accompanl'ing drawin `,'vhicli- T e ngureis a ongitudinal section thi-ou h the axis of the complete device, the lian e and movable parts o the vaii'ing mechanism being shown in elevation.

The reservoir is shown as a cylinder comprising two sections, 1, :2, of an desired diameter, preferablythe saine iameter, detaclnibly secured as by an internal sleeve, 3, threaded to adjacent ends of the sections and secured to one of them, preferably section :2, as by pin rivets, 4, 4.

In section l. there is a double-headed pis ton comprising the head. 5. adapted to 'sustain the actuating air pressure and nl head 6, facing the opposite wav. to appl sai pressure to the grease. 'l'liese iea are spaced apart :i distance suicicnt to prevent tendency to cock in the cylinder b a spacer cylinder, with the end of u'liic i they .are tightly engaged by :i rivet, 8. This rivet is double-headed and serves also to secure to ctlier the parts of the two piston heads cli each com rise, a metal cup, 9, cup washer, 10. pre rabl'y of leather, and n. disc, 11, whereby the cup leather is clamped against a cup, 9.

It will be understood that the cylinder section, 1, may be as long as desired and that this is filled with grease by unseren-ing it from the collar, 3, and filling it through the open end.

Section 2 contains the secondary piston, faced toward the grease and of the saine construction as the heads in section 1, except tliit the cup. 9*, cup leather, 10*, and disc, 11", are clamped together between u flange, 1:2, integral with a tubular nipple. I3, and a nut. 1-1, screwed on the exterior of said nipple.

This nipple has the grease inlet, 15, formed with a valve seat. 16. leading to u valve chamber, 1T. containiu r a ball vulve, 1S. Tlie outlet of this chain r is through n tube, 19, telescoping iii a cylindrical outlet passage, 20, iii the nozzle, 2l. carried lJv the licad, 22. closing the outer end of cylinder, 2. the securing menus including a screw-threaded fiance, 23, en aging the interior of the cylint er a ra ial flange, 2-1, encuging the end of the cylinder and suitable means such as agrivet pin, 25, securing the parts againsty unsci'ewing.

In the form shown. tube 19 is screwthi'eaded into the valve chamber nipple, 13, and is formed within the chamber with projections. 26, whereby the ball, 18, is Aprevented from ever closing the outlet through tube 19. A spring, 2T. seated against. the inner face of closure. 22, encircles tube 19 and bears against the rear of valve fitting. lf2. This spring forces the secondary piston to a predetermined normal position, in

which the edge of cup, 9, bears firmly upon the end of the couplin coller, 3. It is evid ent that as against a pressures, u to the limit of the power of spring. 2i die cup 9* of the secondary piston is a lixeil wa l o f the rease containing chamber, the oppositely t irected cup. 9. of the primary piston being a cooperating movable wall for said chamber. Consequently, when the primary cup, 9, is forced against the grease. the cii remaining stationary, the ball, 18, will be forced back into the vali-e chamber. 1T. but will be prevented from closing the oiit- 1ct, by engagement with projections, 26. In this situation, reuse will be forced out through tube, 1 into tubular ssa 20, in the nozzle and thence out t rougi the end of the nozzle. But whenever piessnre is applied on the grease in excess of what the spring 2 can withstand, as ivill naturally be necessary whenever the resistance and back pressure on the nozzle becomes sufiieiently great, the secondary piston will compress the spri moving rearwardl and cari-ying with it ie tube, 19. The ackpressure of the fresse will immediately carry the bull to t ie position shown in the gure, where it locks back tlow escape of grease into the c vlinder. The grease in 19. 20, being thus confined, all the becomes an independent reservoir subjected to all of the ressure applied over the entire area of t e secondary piston, 9*. The spring, 2, may of course be desi ned to hold up against any pressure less t an the total ressure that can be transmitted through the grease from the primary pressure means acting on the primary piston.

The means for applying and controlling the primary pressure is in the end closure for cylinder section 1. This closure comprises an end wall, 30, having an nterniill) 'threaded Harige, 81, prevented from unsorewing as b pin rivet, 81. It is preferably provided; with integral parallel extensions, 32, 32, support' a transverse handgrasp, 33, and prefere. l a lever, 34, for controllin inlet and ou let of pneumatic pressure, ias its operating end in position or engagement by the thumb of an operator grasping handle 38. The lever, 34, is pivoted in a bracket extension, 35, of the enclosure, 30. The latter has screw-threaded therein a nipple. 86, for connection to env 4suitable source of pneumatic pressure. iis nipple supplies air to valve chamber, 37, containing ball valve. 38, normali)- held closed by spring, 39. This valve controls a essa 40, leading to a cylindrical chain er, l, which has a port, 42. through which the air pressure may be applied within the ci'linder, 1, behind the primary piston. It also has a vent outlet. 43.

The chamber, 41, has a piston plunger, 44, having its outer end hed in 4vengagement grease in 20 lllll leo' `ing compressed air with operatin lever, 84, by ressure of spring, 46. T e front face of 's plunger is normally held just clear of the vent outlet, 43, by the lever 34, the outward movemen! of the latter ing limited by a heel member, 47, which comes in contact with the adjacent surface of bracket, 3b. When the ha lever, 34, is depressed against the pressure of sprin 46', the plan r moves mwa closing t e outlet, 48, an thereafter it w1 contact with the end of a channel which extends down through passa 40, into engagement with the inlet ball valv 88. In this tion the operator will fee the maden i sgh sigm, inerme of :eine ance, due to the pressure of spring, 89, and the nir pressureon the ball, and the distance of langer movement between vent closure antcom ressed air inlet makes possible a most de icate control of increase and decrease of pressure on the primary piston' that is to say the distance between ven closure and inlet opening positions of the plunger permits admitting a desired amount of compresed air and then ,closing the inlet without opening the outlet, and thereafter the outlet may be regulnbly opened to decrease the pressure to a desired .extent without o ening the inlet.

A reather opening 22' muy be provided in the other end of t e device to maintain atmospheric pressure 'on the rear surface of the secondary gisten during times when it pushes back un er excess premura and resist-4 ance or return to normal position shown in th d'awing, when such pressure is relieved.

c aim u 1. In duid .feeding means, a casingincluding a reservoir for the duid, means comprisfor a plyingi pressure thereon. outlet means inclu ing inder and piston elements,.the piston head eing yieldably spring held inprcssure receiving .relation to the fluid an havin a hollow stem for outflow of said fluid, e outlet end of said stein being formed as a piston tting an outlet passage with which it telescopes upon rearward movement of' said sprl held piston, a valve whereby reverse (low o the iiud through the stein may be prevented' and means for preventing disengagement of said telescoping members.

2. In reure feed means, a casing including a p uralit of piston and cylinder elements, means or encloslii;` a body of fluid in premire transmitting ation between two of said pistons, means including compressed air wherehy, one of said pistons may be forced against thelluid to transmit pressure to the other piston and spring means for holding the latter piston in normally xed position, a. tube carried by said latter iston and having one end extending throng said piston, the other end formed as a tubular piston telescoping' in a cylindrical outlet bar, 48,.

nozzle upon rearward movement of said spring preed piston, and means for preventing disengagement of said telescoping members.

3. A cylindrical reservoir having end cloeures, one of which has an outlet, a tube ving one end fitted as a piston adn ted to reci ate in said outlet and the ot er end carried by and o i through a piston mit" n normali susto a r' a inst ressure of J,liocl of luhricituiliir tleIl resei'avoir so that the lu ricant is forced through said tube into the nozzle so long as the pressure on the duid is greater than the resistance or back pressure on the outlet nozzle, means for preventing flow of lubricant through said tube when the spring pressed piston yields, and means for preventing dis enageinent of said reciprocating members.

A. grease gun, comprising c lindrical sections, havin ad'aceut ends etachably coupled, one o sai sections having a piston adapted to apply pressure upon ase char into the o en end thereof w en it is d ched from t e other section, and the other section having a piston spring pressed toward the coupling end thereof and rovided with a. tubular iston rod exten 'ng rearwardly into a cylindrical outlet nozzle in 'which it is fitted as a piston, a non-return valve for said tubular piston rod, and means preventin said piston from moving beyond said coup ing en 5. A grease gun, comprising sections, having adjacent ends l coupled, one of said sections having a piston adapted to apply pressure upon ease charged into tie o en end thereof wien it is detached from t e other section, and the other section having a piston spring pressed toward the cou ling end thereof and provided with n tu ular piston rod extending rearwardl iiito a cylindrical outlet nozzle in which it is fitted us a piston, and n nonreturn valve for said tubular piston rod, for the pu ioses described, in combination with means r applying iessui'e on said first mentioned iston. inc uding a head closing the rear endl of the irst mentioned cylinder section provided with suitable inlet and vent orts communicatin with a compressed air inlet normally clo by a check valve maintained on its seat bythe compressed air pres. sure; together with means including a plunger adn ted to close the vent and then open said in et check valve. l

6. A grease gun, comprising cylindrical sections, having adjacent ends detachably coupled one of said sections having a piston aduptectoI apply pressure u on grease into the open end thereo when it is detncied from the other section, and the other section having a piston spring pressed toward the coupling end thereof and rovded with a tubular piston rod exten ing yliridrical etachably lli) lil;

rearwardly into a cylindrical outlet nozzle in which it is fitted as a piston, and a nonreturu valve-for said tubular pistonlrod, tor the pur described, in combination with means r applying rassure on lsaid tiret mentioned iston, inc uding a head closing the rear en of the Hrst mentioned cylinder section provided with suitable inlet and vent ports communicatin with a compressed air inlet normally closed by a check valve maintained on its seat b the compressed air pressure; together with means includin a plunger ada ted to close the vent and t en open said in t check valve, and a lever for controlling said plunger extending in position to be de essed bv the thumb of an operator with iis han fingers grasping a A handle on the rear and of the device.

ff Il dil 'open said in 7. A grease gun, including a lindrical ieservoir haring a nozzle at one en and contiiinin a piston one face of which is adapted to app ly pressure u n g rease chargod into said cy 1n er, in com na'tion. with 'means for ap lying pressure on said pistonI including a iead closin the rear endcylinder, provided with suitable inletand vent ports communicating with a compressed air inlet normally closed b a check valve maintained on its seat b e compressed air pressure; to ether wit means including a plunger at aptcd to close the vent and then open said inlet check valve.

8. A grease gun, including a cylindrical reservoir havin a nozzle at one end and containing a piston one face of which is adapted to apply rassure upon grease charged into said cy index', in combination with means for applyin pressure on said piston, includn a head c osin the rear and cylinder, provi ed with suits le inlet and vent ports communicatin with a com ressed air inlet normally closed by a chec valve maintained on its seat by the compressed air pressure; together with means includin a plunger ada ted to close the vent and en l letdchck valve,tan a lever for contro ling sai unger ex en ing in position to be depregsed by the thumb of an operator with his hand lingers grasping a handle on the rear end of the device.

9. A grease gun, including a casing havin a grease reservoir, an outlet at one end o said casina', means includ' air ressure for fore' the grease towar s said outlet. a movab e piston of relatively large area between the grease and the gun outlet, and subject to pressure exerted on said grease, means normally sustaining said piston against the pressure of the resse under the moderate pressures requir to force feed the grease against ordinary working resistances'but adapted to yield when greater pressures are app ied against greater resistances, relatively small area telescopin tubes constituting piston and cylinder e ements of a force pum one carried by and communieating wit the pressure side of the larger piston and the other rigidly connected to and discharging grease t rough the grease gun outlet an inlet valve a apted to be o ned and permit flow of grease through tie ump under the primary pressure when -tlie arge area piston is sustained a inst said pressure and adapted to close an prevent. reverse flow of grease into the reservoir, when said piston yields and means for preventing disengagement of said tclescoping members.

l0. A grease gun, including a casing having a reuse reservoir an outlet iit one end of sai asin means including air pressure for forcing e grease therein towards said outlet., a movable piston of relatively large area between the grease and the un outlet;i and subject to premura exert on sai ganse means normally tending to sustain e said piston against the pressure oi the grease under the moderate pressures reguired to force feed the grease a inst orinni-y working rosistiinces but a pted to yield when greater pressures are ap lied against greater resstances, a passage mm t e pressure side of the lar area piston to the lgrease gun outlet, inc uding relatively sina area piston and cylinder pump elements, one carried by and communicating with the pressure side of the larger piston and the other ri 'dly connected to and dischargin grease t rough the grease gun outlet; sai passage boing provided with an inlet valve ada ted to open and permit. through liow o grease under the primary pressure when the larger piston is sustained against said pressure and closing to prevent reverse flow of grease into the reservoir, when said iston yields and causes aforcing stroke of t e pump element carried thereby and means for preventing dsenga ement of said small area piston and eylin er pump elements.

11. A grease gun, including a casing having a ase reservoirI an outlet at one end of sai casing means including air pressure for forcin ase towards said outlet, a movable piston element of relatively large area against which pressure on said grease is exerted, and means normally operat-in to sustain said piston against the pressure o said grease, .a relatively small area force pump includin piston, cylinder and valve elements a'or ing a normally open inlet and an outlet through which grease may be forced to the ggun outlet under the primary pressure, the Lorce pump elements bein arranged so that the inlet is closed and a orcng stroke of said ump is actuatedby said lar area piston e ement whenever it yields iin er the primary pressure and means limiting the movement pf such larger area piston element away from said out et.

Htl

12. A. grease gun, including a casin having a grease reservoir,r means inc uding air pressure for applying pressure on the grease therein, a passage from the interior of the reservoir to a suitable grease gun outlet, including relatively small diameter telesco ing tubes constituting piston and cylin er pump elements of a small force pump, one of said tubes being carried by and receiving grease from said pressure reservoir, and the other connected to and dischar grease through said grease gun outlet; sai

passage being provided with an inlet valve adapted to open and permit iniiow of grease under the 'primary pressure when the pressure drop 1s outward and closing to prevent reverse flow of grease into the reservoir, when said tubes are forced to telescope and means preventing disengagement of said telescoplng elements. ed at New York city in the county of ew York, and State of New York, this 8th day of January, A. D. 1926. l

HERMAN ALBERTINE.

l2. A grease gun, including a casin having a grease reservoir, means inc uding air pressure for applying pressure on the grease therein, a passage from the interior of the reservoir to a suitable grease gun outlet, including relatively small diameter telescoping tubes constituting piston and cylinder pump elements of a small force pump, one of said tubes being carried by and receiving grease from sald pressure reservoir, and the other connected to and discha gin grease through said grease gun outlet; sai

passage being provided with an inlet valve adapted to open and permit iniow of grease under the primary pressure when the pressure dro i is outward and closing to prevent reverse ilow of grease into the reservoir, when said tubes are forced to telescope and means preventing disengagement of said telescoping elements.

Signed at New York city in the county of New York, and State of New York, this 8th day of January, A. D. 1926.

HERMAN ALBERTINE.l

DISCLAIMER: Y"

1,633,356.-Herman Albertina, East APPARATUS. Patent dated June Rutherford, N. J. FORCE-FEED LUBRICATING 1927. Disclaimer filed May 24, 1929, by

the patentee, said Albertina, and the assignee by mesne assignments, Rogers Products Oo., Inc.

Hereby enter this disclaimer to that part of the claim in said specification which 'is in the following Words, to wit:

having o ne end fitted asa piston sistance or back "3. A cylindrical reservoir having end closures,

adapted to reciprocate 1n said outlet and the other nozzle so long as the pressure pressure on the outletnozzle, cant through said tube when the'spring pressed piston one of which has an outlet, a tube means for preventingback iiow of -lubriyields, and means for preventing disengagement of said reciprocating members.`

[Oficial Gazette June 18, 1.929.]

DISCLAIMER.

1,633,356.`Herman Albertina, East Rutherford, N. J. FORCE-FEED LUBRICATING APPARATUS. Patent dated June 21, 1927. Disclaimer filed May 24, 1929, by

the patentee, said Albertina, and the assignee by mesne assignments, Rogers Products Co., Inc.

Hereby enter this disclaimer to that part of the claim in said specification which is in the following Words, to wit:

3. A cylindrical reservoir having end closures, one of which has an outlet, a tube having one end fitted as a piston adapted to reciprocate in said outlet and the other end carried by and opening through a piston normally sustained by a spring against pressure of a body of lubricant in the reservoir so that the lubricant is forced through said tube into the nozzle so long as the pressure on the fluid is greater than the resistance or back pressure on the outlet nozzle, means for preventinglback flow ol'lubricant through said tube when the spring pressed piston yields, and means for preventing disen agement of said reciprocating members.

[Ojcial (gazette June 18, 1.929.] 

